In addition , imperfections like drag and gas holes were easy to turn out in the surface of epc casting for imperfect technology design , and this was verified by the actual castings 同时发现，在消失模铸件表面容易因残余泡沫而造成表面渣气孔，实际铸件的表面质量也证明了这一点。
Abstract : in this paper , the coding meaning and the coding system requirements for investment castings are introduced , and the structure of rmbm - x coding system for investment castings and the determination of coded numbers are expounded in detail 文摘:介绍了熔模铸件编码的意义和对熔模铸件编码系统的要求，详细阐述了rmbm - x熔模铸件编码系统的结构和各码位码号的确定。
In - depth knowledge of supplier base in the following manufacturing processes / products : investment / lost - wax / precision casting , zinc die - castings , aluminum casting ( gravity & pressure ) , iron casting , permanent mold casting , sand casting , powdered metallurgy , mim , steel forging , brass forging , cold forming , stamping , deep drawing , fine blanking , machining ( milling , turning , etc . ) , sheet metal fabrication , screw machining , cnc machining , mould making , tool & die , assembly , fasteners , springs , etc 对以下金属制造工艺/零部件的供应商有资深专业经验：脱蜡/精铸件，锌合金压铸件，铝铸件（浇铸或压铸） ，铁铸件，永久模铸件，沙铸，粉状冶金零件，金属粉末注射成形件，钢铁锻造，黄铜锻造，冷锻/冷镦，冲压件，拉深引深件，精密下料，机加件（自动车，数控机床，铣，车，磨等） ，板金件，制模及模具装配、标准件，弹簧类。
